[Feat]: AI Chat component enhancements

[iamfaran]

Proposed changes

this PR adds the enhancements / new components like
AI Chat LLM, Chat Box, and Chat Controller which has been completed and thoroughly tested

Types of changes

What types of changes does your code introduce to Lowcoder?
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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Checklist

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This is simply a reminder of what we are going to look for before merging your code.
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• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules

Further comments

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